Orangutans lack a part of the body that other of its community have.Name that part?

Question

Please send me the answer as early as possible

Answer 1

Perhaps you (and me) also lack that part!

Answer 2

Orangutans lack the Strong Brow Ridges of chimpanzees and gorillas.

In addition, unlike the African great apes and humans, orangutans lack an anterior belly of the digastric muscle extending from the hyoid.